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叶轮
相关语句
  impeller
    A MNC SYSTEM USED ON NC MACHINING TURBINE IMPELLER WITH 5-DIMENSION INTERPOLATION
    五维插补数控加工透平叶轮的MNC系统
短句来源
    IMPELLER 5-COORDINATE CAD/CAM TECHNICAL RESEARCH BASED ON NURBS PRINCIPLES
    基于NURBS理论的叶轮五坐标CAD/CAM技术研究
短句来源
    RESEARCH ON INTEGRATED CAM SYSTEM FOR IMPELLER
    关于叶轮集成化智能CAM系统的研究
短句来源
    The Study on CAD/CAM System of Injection Mould for the Kind of Impeller
    叶轮类注射模具CAD/CAM系统研究
短句来源
    Hydraulic Design Method of Impeller With Width-Variation Double Channel and its CAD Software
    变宽双流道叶轮的水力设计方法及CAD软件
短句来源
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  “叶轮”译为未确定词的双语例句
    CAD/CAM software for integrated blade of missile turbine engine
    弹用发动机整体式叶轮CAD/CAM的研究
短句来源
    The paper introduces the basic connect of virtual products design and the theory, the process, the methods of virtual assembly technology. The authors design turbine blade by the virtual assembly technology, analysis and check the spare parts design and structure design. According to the results, the spare parts design and structure design are corrected.
    阐述了虚拟产品设计的基本内容和虚拟装配技术的原理、过程和方法,以风机叶轮组件为产品设计对象,进行虚拟零部件设计和虚拟装配设计,并进行相应的装配检验,对产品的零部件及结构设计进行分析、评价和设计修改,从而在计算机虚拟环境中完成了产品的开发设计过程,大大缩短了新产品的开发设计过程.
短句来源
    This method was applied in Five-axis NC simulation system base on compressed voxel model, which has gained excellent effect. The disadvantages of current five-axis NC simulation method and commercial software systems are overcome. The method is the key technology for the virtual numerical control machining.
    该方法在《基于压缩Voxel模型的五坐标数控加工仿真系统》中得到了应用并完成了某叶轮的五坐标数控加工仿真,仿真结果三维信息完备,NC编程人员可从任意方向观察、验证仿真结果,克服了现有五坐标数控加工仿真方法和商品化软件系统的不足,该方法是虚拟数控加工的关键技术。
短句来源
    COMPUTER AIDED DESIGN OF PLANE VIEW DRAWING AND WOODEN MODEL DRAWING OF CENTRIFUGAL PUMP VANE WHEEL
    离心泵叶轮平面图及木模图的计算机辅助设计
短句来源
    THE COMPUTER AID DESIGN OF CENTRIFUGAL PUMP IMPERLL
    离心泵叶轮的计算机辅助设计
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  impeller
First, the internal flow field of each impeller was calculated.
      
Second, the concurrent working point of each impeller was approximately estimated.
      
Finally, a calculation was performed considering the influence on each impeller.
      
Although both impellers had the same blade cross-section, one impeller had a two-dimensional blade, while the other had a leaned blade.
      
The average cavitation performance of each impeller was satisfactorily predicted by the numerical simulations.
      
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In the designing of the curved surface of the impeller, in order to minimize the energy consumed by this type of surface, it is necessary to present the theoretical streamline obtained through calculations and to plot the mould line showing the shape of the vanes correctly in the drawing.However, the problem to be solved is how to keep constant the angle of inclination obtained through the calculations of the mould lines in the construction process. In this article, the construction principle and method of the...

In the designing of the curved surface of the impeller, in order to minimize the energy consumed by this type of surface, it is necessary to present the theoretical streamline obtained through calculations and to plot the mould line showing the shape of the vanes correctly in the drawing.However, the problem to be solved is how to keep constant the angle of inclination obtained through the calculations of the mould lines in the construction process. In this article, the construction principle and method of the conformal net have been put forward by using the con-formal transformation in complex functions, thus solving the problem theoretically and practically.

叶轮曲面的设计中,为了确保这类曲面形状使能量损耗最少,必须把计算出的理论流线正确地反映到设计图纸上去,作出反映叶片形状的型线来。但怎样保证在作图过程中型线上计算所得的倾角大小不变,是一有待解决的问题。本文应用复变函数中的保角变换建立保角网格的作图原理和方法,从而在理论上和实际作图中解决了这一问题。

The blade (lug) of a blade-wheel is the basic element to interact with the soil. The driving profile of a double-curved-profile blade is the profile to obtain thrust and lift characteristics. It's geometrical parameters have highly significant effect on the mobility performance of the rigid wheel at wet paddy field.In order to develop and to design the geometrical parameters of the driving profile, there are two fundamental principles that must be kept in mind. The first principle is the fundamental law of conjugate...

The blade (lug) of a blade-wheel is the basic element to interact with the soil. The driving profile of a double-curved-profile blade is the profile to obtain thrust and lift characteristics. It's geometrical parameters have highly significant effect on the mobility performance of the rigid wheel at wet paddy field.In order to develop and to design the geometrical parameters of the driving profile, there are two fundamental principles that must be kept in mind. The first principle is the fundamental law of conjugate action between two meshing profiles, when two profiles are designed to produce a constant angular velocity ratio during meshing, they are said to have conjugate action. In order to transmit motion at a constant angular velocity ratio, the pitch point P must remain fixed, and the line of action must remain intersected the horizontal line at a constant pressure angle. The second principle is that the rolling motion and locus of any point of a slipping wheel must be used in developing the parameters of a blade.The rate of slip of a slipping driving wheel is the main parameter which relates with all other geometric parameters of blades. It acts some thing like the 'module m' of a gear profile.This paper analyses and deals with nine geometrical parameters of the driving profile of a blade. Those are.Top circle pitch circleBase circle Inclined anglePressure angle Radial height of profileContact length Arc length of profileRolling wheel angle within meshing The author derives the following equations to relate the nine parameters.1 . Rate of slip 5 and radius of pitch circle r, radius of top circle2 . The inclined angle (y) equation 0=1- ^-HULjSY-.3. The pressure angle (a) equationcos (tga) -tgasin (tga)b _ jTo compute the above two equations, the author develops his program using the Programmable casio fx-1 calculator, and obtains the value y and a with respect to 6, and plots the curves of the above equations. The curves intersect at a point which represents optimum value of inclined angle and pressure angle with respect to the rate of slip (y = a = 26.5%, o=14.87%) .4 . Radius of base circle (rg)rg = rcoscc = r0 (1-5) cosacos (tga) -tgasin (tga) = r0 -------- ------------- cosa5. The radial height (h)h"=r0 (1 -5) ( 1 -cosa) 6 . The arc length of profile (s) s= -i-rgtg2a0r20 sin2a 2rg7. Contact length (L)L = r0sina8. The rolling wheel angle within meshing? - L ro sina , 昬A + eA2=-^ + Y = - - - + Yrs rgFor a blade profile with 26.51? inclined angle and pressure angle, the rolling angle of wheel within meshing is 60. 08? and thus the minimum blades in one wheel are six. Six blades are sufficient to assure that there is always a blade in meshing with the soil.This paper lists out three tables of tractor test data which reveal the performance of 30? inclined angle blade wheel mounted on wheel tractors, riding tractors, and boat-type tractors. The data shows that the tractive efficiency of these three kinds of tractors with blade wheels are 48-54%, but for other wheels they are 10-43%.The author designs the optimum geometrical parameters of 26.50?blade wheels and compares them with the parameters of the 30癰lade wheels.The author hopes that the advanced theoretical study of the driving profile of a blade will give the tractor more tractive efficiency,and thus increasing the tractor's pull and obtaining the higher fuel efficiency. The fuel saving will give from 5 to 9 % for the paddy field wheel tractors.

木田叶轮的轮叶是参与土壤相互作用的基本元件。轮叶驱动面是轮叶产生推力、承力性能的工作面。轮叶驱动面的几何形状参数对驱动轮的工作性能和整机牵引性能有重要影响。本文提出确定轮叶驱动面几何参数的两个基本原则:一是机械原理的共轭啮合基本定律,要求啮合过程节点位置不变,压力角维持一定;二是符合驱动轮的滑转滚动轨迹和规律。本文提出以滑转率δ为最基本参数建立其他参数关系式。本文对轮叶驱动面下面九个几何形状参数进行分析:顶圆、节圆、基圆、倾角、压力角、轮叶高、叶形曲率弧长、啮合线长、以及一个轮叶与土壤啮合过程中的轮子转角。本文推导出上述几何参数与滑转率的八个关系式。其中,对轮叶倾角和压力角作了详细的分析,用编程序的电子计算器Casio·Pro·Fx-1将倾角、压力角与滑转率关系式(δ=1-(2sinγ-tgγ)/γ,δ=1-cos(tgα)-tgαsin(tgα)/1-tg~2α)进行连续计算并绘出两曲线,得出交点可作为倾角与压力角最佳值γ=α=26.51°,其相应最佳滑转率值为14.87%。根据上述原则,可推算出一个轮叶与土壤啮合接触过程的轮子转角,对于压力角及倾角等于26.51°的轮叶来说,轮子转角为68.0...

木田叶轮的轮叶是参与土壤相互作用的基本元件。轮叶驱动面是轮叶产生推力、承力性能的工作面。轮叶驱动面的几何形状参数对驱动轮的工作性能和整机牵引性能有重要影响。本文提出确定轮叶驱动面几何参数的两个基本原则:一是机械原理的共轭啮合基本定律,要求啮合过程节点位置不变,压力角维持一定;二是符合驱动轮的滑转滚动轨迹和规律。本文提出以滑转率δ为最基本参数建立其他参数关系式。本文对轮叶驱动面下面九个几何形状参数进行分析:顶圆、节圆、基圆、倾角、压力角、轮叶高、叶形曲率弧长、啮合线长、以及一个轮叶与土壤啮合过程中的轮子转角。本文推导出上述几何参数与滑转率的八个关系式。其中,对轮叶倾角和压力角作了详细的分析,用编程序的电子计算器Casio·Pro·Fx-1将倾角、压力角与滑转率关系式(δ=1-(2sinγ-tgγ)/γ,δ=1-cos(tgα)-tgαsin(tgα)/1-tg~2α)进行连续计算并绘出两曲线,得出交点可作为倾角与压力角最佳值γ=α=26.51°,其相应最佳滑转率值为14.87%。根据上述原则,可推算出一个轮叶与土壤啮合接触过程的轮子转角,对于压力角及倾角等于26.51°的轮叶来说,轮子转角为68.08°,这样表明叶轮的最少叶数为六个,便可保证任何时刻都有轮叶与土壤啮合接触。本文列出多年来按上述原则设

Auto CAD is used to design and draw detail drawings of impellers, interface program compiled to connect with high-level language program in accordance with formal requirement of figure exchange file.

本文应用Auto CAD软件设计和绘制叶轮零件工作图,按图形交换文件格式的要求,编制接口程序与高级语言程序联接。

 
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